for a second offence or any subsequent offence, to a fine of not less than twenty times the amount of the excise duty or one hundred thousand ringgit, whichever is the greater amount, and of not more than forty times the amount of the excise duty or one million ringgit, whichever is the greater amount, or to imprisonment for a term not exceeding seven years or to both:
Provided that when no excise duty is involved or the amount of the excise duty cannot be ascertained, the penalty may amount to a fine not exceeding five hundred thousand ringgit or to imprisonment for a term not exceeding five years or to both;”;